Needless to say, Berlin is Europeís hottest art spot. This month, London-and-Zurichís Haunch of Venison gallery opens a new branch there in a former industrial space at Heidestrasse 46, Berlin-Tiergarten, near Invalidenstrasse and right behind Hamburger Bahnhof and the Flick Collection. And, on Sept. 30, Goff + Rosenthal became the first New York gallery to join L.A.ís Peres Projects in bringing the radist, badist, hottest American art to Berlin.